Control: The group that does not receive the IV
IV: What the scientist changes
DV: What changes because of the IV
The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. Balancing chemical equations is a process of trial and error.
I dont know what you are asking sorry can u elaborate
Answer:
x = 3.76 cm
y = 3.76 cm
Explanation:
This composite shape can be modeled as a square (7.2 cm × 7.2 cm) minus a quarter circle in the lower left corner (3.6 cm radius) and a right triangle in the upper right corner (3.6 cm × 3.6 cm).
The centroid of a square (or any rectangle) is at x = b/2 and y = h/2.
The centroid of a quarter circle is at x = y = 4r/(3π).
The centroid of a right triangle is at x = b/3 and y = h/3.
Build a table listing each shape, the coordinates of its centroid (x and y), and its area (A). Use negative areas for the shapes that are being subtracted.
Next, multiply each coordinate by the area (Ax and Ay), sum the results (∑Ax and ∑Ay), then divide by the total area (∑Ax / ∑A and ∑Ay / ∑A). The result will be the x and y coordinates of the center of mass.
See attached image.
Answer:
a) 4.8×10^-5T
b) 7.38×10^-7seconds
Explanation:
The centripetal force in a magnetic field is given by:
qvB= mv2/r
Where q= charge of the ion
m= mass of the ion
r= radius of the circular path
B= magnetic field
V= velocity
Rearranging to make B subject of formular gives:
B=mv/r
B= [(9.11×10^-31)×(5.87×10^5)]/ [(1.6×10^-19)×(6.81×10^-2)]
B = (5 34×10^-25)/(1.099×10^-20)
B= 4.86×10^-5T
b) T =( 2 pi × r)/v
T = 2 × 3.142 x (6.81×10^-2) / (5.87×10^5
T = 0.428/ (5.87×10^5)
T = 7.38 × 10^-7seconds